Finding the Fourth Proportional to 6,666.42, 10,002.55 and 3,158.93

Step by Step Solution

1. Step 1: Write the proportion equation
   6,666.42 : 10,002.55 = 3,158.93 : x
2. Step 2: Convert to fraction form
   6,666.42/10,002.55 = 3,158.93/x
3. Step 3: Cross multiply
   6,666.42x = 10,002.55 × 3,158.93
4. Step 4: Simplify right side
   6,666.42x = 31,597,372.38
5. Step 5: Solve for x
   x = 31,597,372.38/6,666.42
6. Step 6: Final answer
   x = 4,739.78